Narragansett Bay Commission

Sustainable Energy Management Practices for Wastewater f

Treatment FacilitiesEPA State Innovations Grant

Funded Project

James McCaughey PEJames McCaughey, PEESTA Program Manager

Presentation Outline

1. Project Problem Statementl2. Project Outline

3. Project Partners/Stakeholders4 NBC WWTFs4. NBC WWTFs5. EF-EMS Project Component6. FOG ERP Project Component6. FOG ERP Project Component7. Project Measurement8. NBC Energy Management Projects

Project Problem Statement

• Wastewater Treatment Facility (WWTF) operations have high energy demandshave high energy demands

• Energy demand increases with advanced treatment• Energy costs are increasingEnergy costs are increasing• Energy derived from fossil fuels create GHGs• Waste grease impacts WWTF operations• Waste grease can be a valuable source of renewable

energy

NBC - Sustainable Energy Management Practices for Wastewater Treatment Facilities

• Wastewater Treatment Facility Energy Focused Management System

Modeled after ISO 14001 EMS – Modeled after ISO 14001 EMS – Improve WWTF Energy Efficiency– Encourage/Increase use of Renewable Energy

ResourcesResources

• Environmental Results Program for Restaurants and Food Service Industry SectorSector– Improve Management of FOG – Reduce the Discharge of Waste Oil and Grease to the

Sewer System and Sewer System, and – Promote the Use of Waste Oil and Grease as a Source

of Renewable Energy

Project funded through: $275 000 EPA SIG Grant AwardProject funded through: $275,000 EPA SIG Grant Award

Project Stakeholders

Stakeholders• Rhode Island Department of Environmental ManagementRhode Island Department of Environmental Management• Rhode Island’s 19 WWTFs• RI Cities and Towns

Rh d I l d H it lit A i ti• Rhode Island Hospitality Association• Rhode Island Department of Health• Environmental Protection Agency• National Grid• Restaurants/Food Service Industry• Bio-Diesel Production Facilitieso ese oduct o ac t es• Waste Grease Rendering Facilities

Project PartnersPartners• Rhode Island Department of

Environmental Management –Environmental Management –Office of Technical Assistance and Customer ServiceU i it f Rh d I l d • University of Rhode Island –Center for Pollution Prevention and Environmental Health

• Rhode Island Manufacturers Extension Services

• Narragansett Bay Commission• Narragansett Bay Commission

Narragansett Bay Commission

• Rhode Island’s Two Largest WWTFReceive both Wastewater and • Receive both Wastewater and Stormwater Flow

• Provide Wastewater Collection and Treatment Services to:Treatment Services to:– Ten Cities and Towns– 360,000 People

8 000 B i– 8,000 Business• 241 Employees• 19 Member Board of Commissioners• Rates set by PUC

NBC Wastewater Treatment FacilitiesFacilities

• Field’s Point WWTF– 45 MGD (170.1 MLD) Average( ) g– 65 MGD (246 MLD) Secondary– 200 MGD (756 MLD) Primary– Chlorination/De-chlorination/– Sludge Gravity Thickeners– 4 Pump/Lift Stations

• Bucklin Point WWTF• Bucklin Point WWTF– 24 MGD (90.8 MLD)– 46 MGD (174 MLD) Secondary/Tertiary

116 MGD (438 MLD) P i– 116 MGD (438 MLD) Primary– UV Disinfection– Anaerobic Digestion

3 P /Lift St ti– 3 Pump/Lift Stations

EF-EMS Project ComponentProject Participation – 19 RI WWTFsProject Tasks:

i i b• Form Steering Committee – October 2008• Project Kick-Off Meeting – December 2008• Training on use of EPA “Energy Guidebook” – February 2009

Training on use of Energy Star Portfolio Manager April 2009• Training on use of Energy Star Portfolio Manager – April 2009– Establish energy-use baselines for each participating WWTF – use

Portfolio Manger• Establish EF-EMS Roundtable - April 2009

– Implement Plan-Do-Check-Act aspect of each EF-EMS• Energy use assessments for participating WWTF – May 2009

– Identify Energy Conservation and Efficiency Measures (ECEMs)– Identify renewable energy resource opportunities– Identify renewable energy resource opportunities

• Project Measurement – September 2010

RI WWTF Estimated Energy UseFacility Name/ address

Average Flow MGD

Estimated MW

(Efficiently Operated)

Estimated MWH/year

Estimated Cost/Year

(@$0.11/kwh)

Bristol WWTF 3.3 0.1524 1,335 $146,809 B ill ill WWTF 0 8 0 0370 324 $35 667Burrillville WWTF 0.8 0.0370 324 $35,667Cranston WPCF 12 0.5498 4,817 $529,826 East Greenwich WWTF 0.9 0.0416 365 $40,122 East Providence WWTF 7 0.3221 2,822 $310,414 Jamestown WWTF 0.4 0.0185 162 $17,840 Narragansett Bay Commission - BP 24 1.0882 9,532 $1,048,551Narragansett Bay Commission - FP 45 2.0025 17,542 $1,929,609 Scarborough WWTF 0.7 0.0324 284 $31,211 New Shoreham WPCF 0.1 0.0046 41 $4,461 Newport WWTF 8 0.3678 3,222 $354,451 Quonset Point WWTF 0.8 0.0370 324 $35,667 Smithfield WWTF 1.8 0.0832 729 $80,182 South Kingstown WWTF 2.985 0.1378 1,208 $132,831 Warren WWTP 1.6 0.0740 648 $71,285 Warwick WWTF 4.1 0.1892 1,657 $182,272 West Warwick Reg. WWTF 5.3 0.2443 2,140 $235,375 Westerly WWTF 2.2 0.1017 891 $97,966 Woonsocket Reg. WWTF 9.3 0.4271 3,742 $411,583

130.29 5.91 51,783 $5,696,121

FOG ERP ComponentProject Participation – 600 plus permitted restaurantsProject Tasks:

F St i C itt O t b 2008• Form Steering Committee – October 2008• Develop FOG management checklist and set of BMPs –

November 2008– Develop assistance tools and FOG management “self-Develop assistance tools and FOG management self

certification” procedures• Initial facility assessments and historic data analysis –

January – December 2009f ll b• ERP follow-up assessments – January 2010 – December 2010

– Compare performance improvements – Identify opportunities and problems associated with using

collected FOG as a source of renewable energy collected FOG as a source of renewable energy • Project Measurement – September 2012

NBC WWTF Oil and Grease LoadingsLoadings

14 000

10,000

12,000

14,000

BP

40.0

mg/l

4,000

6,000

8,000

lbs/

day FP

25.0

30.0

35.0

FP

BP

0

2,000

,

1 2 3 4 5 6 7 8 9 10 11 12

Month 10 0

15.0

20.0

ppm

Month

0.0

5.0

10.0

1 2 3 4 5 6 7 8 9 10 11 12

Month

Lbs/Day

Grease Waste from FP WWTF

90.00

100.00

70.00

80.00

40.00

50.00

60.00

10.00

20.00

30.00

0.00Aug-07 Sep-07 Oct-07 Nov-07 Dec-07 Jan-08 Feb-08 Mar-08 Apr-08 May-08 Jun-08 Jul-08

Tons of Dry Scum Tons of Dry Scum

NBC – Energy TrackingPortfolio ManagerPortfolio Manager

Facility Name

Current Energy Period

Average Flow (MGD

(million

Total Floor Space

Current Site Electric Use

(kWh Current Site Natural Gas

Use

Current Total Site Energy Use (kBtu

Annual Energy Cost (US DollarsEnding

Date (million gallons

per day))

Space (Sq. Ft.) (thousand

Watt-hours)) Use

(therms) (thousand Btu))

(US Dollars ($))

Bucklin Point 12/31/2007 20.4 N/A 10,946,327.30 123,055.00 49,654,368.65 $1,381,885.47 Central Avenue Pump Station 12/31/2007 0.3 N/A 37,696.20 0 128,619.45 $5,176.28 Corporate Office Building 11/30/2007 N/A 37,810 973,491.40 19,606.60 5,282,209.00 $130,993.54 Ernest Street Pump Station 12/31/2007 41.6 N/A 2,080,609.10 33,731.00 10,472,138.14 $265,688.84 Fields Point 12/31/2007 43.2 N/A 12,709,101.50 40,391.00 47,402,554.34 $1,438,948.37 George Washington Highway Pump Station 11/30/2007 0.3 N/A 142,434.20 3,990.80 885,065.39 $22,641.80 Interceptor pMaintenance 12/31/2007 N/A 8,000 59,493.50 6,542.30 857,225.35 $18,345.76 Laboratory 12/31/2007 N/A 11,000 332,897.00 14,168.40 2,552,681.02 $57,261.43 Omega Pump Station 11/30/2007 1 N/A 85,845.50 3,047.80 597,688.56 $15,565.70 Reservoir Avenue Pump Station 12/31/2007 0.1 N/A 53,744.60 0 183,376.57 $7,795.53 Saylesville PumpSaylesville Pump Station 11/30/2007 0.7 N/A 80,500.70 0 274,668.39 $11,899.61 Washington Park Pump Station 11/30/2007 0.3 N/A 134,867.10 0 460,166.69 $21,585.65 Group Total 56810 27637008.1 244532.9 118750761.6 $3,377,787.97

NBC – Energy TrackingPortfolio ManagerPortfolio Manager

C t

Facility Name Current

Energy Period Ending Date

Current Site (kBtu/gallons per

day)

National Average

(kBtu/gallons per day)

Current Site

Energy Intensity (kBtu/Sq.

Ft.)

National Average

Site (kBtu/Sq.

Ft.)

Current Rating (1-

100)

Bucklin Point 12/31/2007 2.4346 4.2 N/A N/A 88 Central Avenue PumpCentral Avenue Pump Station 12/31/2007 0.3801 2 N/A N/A N/A Corporate Office Building 11/30/2007 N/A N/A 139.7 111.7 29 Ernest Street Pump Station 12/31/2007 0.2517 2 N/A N/A N/A Fields Point 12/31/2007 1.0963 1.6 N/A N/A 81 George Washington Highway Pump Station 11/30/2007 2.9571 2 N/A N/A N/AInterceptor Maintenance 12/31/2007 N/A N/A 107.2 77 N/A Laboratory 12/31/2007 N/A N/A 232.1 104 N/A Omega Pump Station 11/30/2007 0.6046 2 N/A N/A N/A Reservoir Avenue Pump Station 12/31/2007 2.1151 2 N/A N/A N/A Saylesville Pump Station 11/30/2007 0 3778 2 N/A N/A N/ASaylesville Pump Station 11/30/2007 0.3778 2 N/A N/A N/AWashington Park Pump Station 11/30/2007 1.3284 2 N/A N/A N/A

NBC Wind EnergyField’s Point - Wind Energy Project

– $25,000 State Energy Grant– Wind Resource Study

Vid Si l ti– Video Simulation– FAA Application– Interconnect Assessment– Avian Impact Studyp y– Noise Impact Study– Permitting– Public Outreach

Wind Turbine

Size

Tower Height

(meters)

Rotor Diameter (meters)

Maximum Height

(meters)

Rated Capacity

(kW)

Electricity Produced

(kWh)

Reduced CO2 Emissions

(lb)Savings

Installed Cost

(million $)

Payback (Years) ROR

Small 65 47 89 600 929,210 1,162,442 $120,797 $1.75 14 7%Medium 65 77 104 1,500 2,323,026 2,906,106 $301,993 $3.84 13 8%Large 80 77 119 1,500 2,700,350 3,378,138 $351,046 $4.20 12 8%

NBC Biogas EnergyBucklin Point - Bio-Gas Energy

Project– $25,000 State Energy Grantgy– Bio-Gas Resource Study– SCS Review/Assessment– Siloxane Removal

Interconnect Assessment– Interconnect Assessment– RIDEM Air Permits

SystemElectrical Energy MWh

Recovered Heat Energy

MMBTU

Natural Gas

Required

Natural Gas

Displaced

Total Heat

MMBTU

Electrical Energy Value

Heat Energy Value

Displaced Natural Gas

Value

Total Energy Value

Excess Bio Gas MMSCF

Capital Cost

Operating Cost

Payback PeriodMWh MMBTU MMBTU MMBTU MMBTU Value Value Value Value MMSCF

Boiler 0 35,745 6,842 0 42,587 $0 $550,473 $0 $550,473 30 N/A $150,327 N/AMicroturbine 500 kW 2,753 22,616 871 5,971 23,487 $385,420 $348,286 $91,953 $825,660 21 $1,625,420 $293,124 8.82RICE 600 kW 4,078 18,768 3,801 3,041 22,569 $570,920 $289,027 $46,831 $906,779 7 $1,783,341 $411,746 8.66

Anticipated Project Outcomes

• Improve Energy Efficiency of participating WWTFs by 5 • Improve Energy Efficiency of participating WWTFs by 5 to 10 % over base year performance (2007)

Decrease WWTF energy demand on local grid by 10 • Decrease WWTF energy demand on local grid by 10 –20% using renewable energy resources

D tit f i d t WWTF• Decrease quantity of grease received at WWTFs

• Increase use of waste grease as a source of renewable energy by 25%